The Pentium D brand refers to two series of desktop dual-core 64-bit x86-64
microprocessors with the NetBurst microarchitecture, which is the dual-core
variant of Pentium 4 "Prescott" manufactured by Intel. Each CPU comprised two
dies, each containing a single core, residing next to each other on a multi-chip
module package. The brand's first processor, codenamed Smithfield, was
released by Intel on May 25, 2005.